B細胞のスーパーエンハンスターとレギュレータクラスターは,AIDの腫瘍発生性活動を勧誘する
Jason Qian1, Qiao Wang2, Marei Dose1
1Genomics and Immunity, NIAMS, NIH, Bethesda, MD 20892, USA.
Cell
|December 9, 2014
まとめ
抗体遺伝子変異体である活性化誘発性シチジンデアミナーゼ (AID) は,ランダムにではなく,スーパーエンハンサー内の腫瘍遺伝子を標的にします. これらの3Dリンクされた規制領域は,AIDを募集するために協力し,腫瘍発生を推進します.
科学分野:
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
- 癌生物学 癌生物学について
背景:
- アクティベーション誘発型シチジンデアミナーゼ (AID) は抗体多様化に不可欠ですが,腫瘍遺伝子の変異と腫瘍発生を引き起こします.
- 非免疫グロブリンロシのAID活動に対する感受性は,まだ十分に理解されていません.
- 核構造とB細胞レギュロームの文脈は,AIDの非標的効果に関与しています.
研究 の 目的:
- AIDの標的のゲノム分布と規制文脈を調査する.
- 核組織がエイズ媒介のDNA損傷にどのように影響するか理解するためです.
- 非免疫グロブリン遺伝子のAID徴募のメカニズムを解明する.
主な方法:
- 核アーキテクチャとB細胞レギュレームの文脈におけるAID目標の分析.
- AIDの採用における3Dリンクされた標的の役割を研究するためのゲノム編集.
- 異なる細胞タイプ (マウスのB細胞,ヒトリンパ腫,MEF) にわたるAID誘発変異の比較分析.
主要な成果:
- AIDのターゲットはランダムに配分されず,スーパーエンハンサーと規制クラスターに集中しています.
- AIDは,これらのドメイン内のアクティブプロモーターとeRNA (((+) 強化器を分解し,これらのドメインは,大きなゲノム距離で相互接続することができます.
- 3Dリンクされたターゲットは,核組織の役割を強調して,AID媒介のブレイクを募集するために協力します.
- AIDは,異なる種類の細胞の異なる遺伝子を標的にしますが,これらの標的は一貫して複雑で高度に転写された超強化剤と関連付けられています.
結論:
- スーパーエンハンサーとレギュレータコンパートメントは,特定のゲノムロケーションへのAIDの採用の重要な仲介者です.
- 核アーキテクチャと3Dゲノム組織は,AIDの活動と,その後の腫瘍生成を指揮する上で重要な役割を果たします.
- これらの規制ハブ内のAIDのターゲティングメカニズムを理解することは,がん予防と治療戦略の開発に不可欠です.
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